I haven't found any irregularities working in Vpp ,Vrms, tested with 4? markers (3 of them delta between them).

What I have observed is that while we are using linear units (W, Vrms or Vpp), when manually modifying SCALE/DIV, the REF LEVEL goes from automatic to manual, almost always leaving the graph off the screen. It's not serious because the solution is to manually turn REF LEVEL into automatic mode. I report it only so that you are aware of this behavior

Toni

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Hi Andy,

You are obviously not an electronics design engineer where your design has to meet compliance standards.

In a previous life I worked for a company designing and developing equipment for Australian Government agencies.
We also did some design and testing work for commercial companies.
We were an accredited Defence EMC Test lab which was recognised by the US, UK and European agencies.
But we could not certify commercial equipment! We had to go out to an accredited commercial lab for commercial certification.
But we could do all our "pre compliance" testing in house.
Needless to say, we never had a piece of commercial kit fail final commercial compliance certification!

The moral of this story is that Commercial Compliance Testing costs BIG bucks so any development and testing you can do in house will save you a lot of money.

So you test your equipment in house with a TinySA Ultra and when you think it is right, you then send it to a commercial lab for Pre-Compliance Testing.
They give you a report as to whether it will pass or fail the final Compliance Test. If it will fail, they tell you where.
You then use your TinySA Ultra to improve your product in house until it passes with a significant headroom margin.
You then resubmit for Pre-Compliance testing again. If it fails, back to the iterative process of in house improvement and testing.
If it passes, go for the Final Compliance test.

Let me assure you, you have just saved yourself an enormous amount of money using the TinySA in house.
Even if you have professional grade equipment, you do not have the requisite Accredited Compliance Test Lab Certification.
So you still have to go to an Accredited Test Lab for the final Compliance testing.

It is a brutal world out there as I am sure Dave will attest to.

Cheers...Bob VK2ZRE

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Erik,
You are amazing.
Didn't anyone tell you it is Christmas and you can take a few days off!
Thank you so much for everything you do for us!
It really is VERY much appreciated.
All the very best for the Festive Season and to a wonderful 2024 New Year.
Cheers from Downunder...Bob? VK2ZRE

?Dave,? ?

?As always you are very knowledgeful and hands on with the equipment - something I've gotten away from over the past 40 years. Maybe I can pick your brain sometime if you don't mind.

As a small consulting business and a non production or as a services contractor I doubt you would be required to maintain a Quality Assurance Program.? I'm not sure if you could be subjected to an audit either.? I'm?not saying what you are doing is wrong at all.? You're?using a working standard, yup, its in the NIST /Z540 program.? If needed you could pay for the paper.

We've strayed greatly from the question on medical equipment production testing.? I think we are of mutual consensus for the most part.??

Erik, Thanks for chiming?in.? Happy Holidays all.??
Cheers Dave,??

Regards,

Andy


?

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But the tinySA (and Ultra variant) is capable of certain professional uses, such as site survey work for radio microphones & similar, as previously noted.

Any comparatively cheap piece of equipment can be used for both “professional” and “non-professional” purposes. Equally, any comparatively expensive piece of equipment can be used for both “professional” and “non-professional” purposes.

There is a separate question as to calibration of equipment, and how long it might endure before re-calibration is required. But that applies to all electronic and mechanical devices.

Or put another way, equipment becomes “professional” if some “professional” person decides that it is suitable for some “professional” purpose. That said, the most usual use of the term “professional” is as a marketing tag. (Or on an invoice!)

Season's Greetings, 73,

Robin, G8DQX

The electronic industry is very dynamic. You can't guarantee that ex-HP ex-Keysight Agilent will be around in 10 years.

Mike N2MS

From my prospective proper design and component testing is where you want the best equipment.? Why base your design with less accurate equipment than the product will be tested with during acceptance testing.? It sounds like a train wreck on the horizon.

Andy

RE: Regulatory?Approval?

Guy's, don't worry
Those in the medical device field know what to ask for and the tinySA can not provide.
But for non medical class of safety related manufacturing the tinySA can be a good tool.
--

On Sun, Dec 24, 2023 at 09:17 AM, Andrew Harman wrote:

But Erik I'm surprised you haven't made a clear statement as to commercial application or exclusion.??

You are right, If only for Eric's protection. There should be a clear statement that this is a hobbyist product and that the responsibility for professional use is solely on the end user.Otherwise someone may use it for compliance testing and subsequently one of the businesses might end up with a huge liability and tries to get back on Eric. Not that any responsible engineer would ever do that but heck one never knows.

John

Erik, having the possibility to execute the save command (menu 9 6) on a command file (*.CMD) from SDcard, you would only need the wait command to cause a wait before executing it. Perhaps creating the wait [n] (seconds or full scans) command is easier to implement than creating the autosave function in the menu. Just a though.

Merry Christmas.
Toni

Martin,

My wife has worked as a RN for over 35 years.? I have to agree on the safety of life issue - I wouldn't rule out a medical malpractice case dragging the validity of use issue into a deposition process.? Someone will just call in an "Expert Witness" that will render an opinion based on best commercial practices.? ? It can be costly and time consuming whether you are party or non-party to these suites.? ?

On a separate note, as technology advances over the next 20 years - how long do you think traditional bluetooth might be around?? ?it may be replaced by the newer Ultra Wideband (I know you're reading this Dave).? I compare it to the likes of earlier spread spectrum.? ?Its now available on cell phones.

Regards,

Andy

Can you connect the cal output to a scope and enable the cal output and see if there is some output.
When you connect the antenna to the RF input, do you see some transmitters?
--

You did replaced the microcontroller?? Why?
The 1.4-133 is the latest...

Istvan

On Sun, Dec 24, 2023 at 06:31 AM, <skharidehal@...> wrote:

I am trying to measure transmitted power(dBm) from my medical device in a RF enclosure at bluetooth frequency(2.442 GHz) using the ultra. This project will remain active for atleast 20 years and I am wondering what would be the lifetime for tinySA (in years maybe?) if i leave it connected to my PC runnning all the time on manufacturing systems.

This rings all sorts of alarm bells with me.

The TinySA is fine to assist with training, design verification and to a certain extent pre-compliance testing, but it can not in any way be considered to be a professional grade item of test equipment. Especially when medical or other 'safety of life' equipment is being validated.

It is difficult enough to maintain calibration of commercial equipment over a 20 year period, and this usually at considerable expense, so a $150 item (good as it is) is just not up to the task.

Regards,

Martin